Arc-lamp motor feed



July 17, 1928.

' 1,677,657 A..c.RoEBucK ARC. LAMP MOTOR FEED Filed April 17, 1922 3 Sheets-Sheet l a zeggmwam July 17, 1928. 1,677,657

A. c. ROEBUCK ARC LAMP MOTOR FEED Filed A ril 17. 1 22 3 Sheets-Sheet 2 .Ellllllflilllilllllllll July 17, 1928.

A. c. ROEBUCK ARC LAMP MOTOR FEED Filed Ap il 17' 1922 3 Sheets-Sheet v V v. V A 7 I a b V I, I 7. i V

V v I I 20 Which- Patented July 17, 1928,

- UNITED STATES TEN oFFIc ALVAH c. noanucx, or cmcaeo, rumors, assr'euon TO THE nurnnrnrsn OPTICAL MANUFACTURING comm, F CHICAGO, ILLINOIS, A conrona'rrou or rumors.

Ar e-LAMP Moron mun.

Application filed April 17, 1922. Serial No. 554,281.

My invention relates to feeding mocha- A further object is the provision of sim .10 ple and efiicient means for varying the rate of feeding motor actuated arc lamp carbons.

' A still further object is the provision of a simple and efficient automatic feeding means for the carbons of an are light of the character mentioned. Other objects will appear hereinafter.

An embodiment of my invention is illustrated in the accompanying drawings, forming a part of Fig. 1

ing machines equipped with an embodiment j of my invention; 25 I Referring more particularly to the drawings, I have indicated. a framework l0 -havbase 1'4is,slidably mounted. A screw '15 {3 is mounted in lug 12 and threaded in a lug v40 i V screw 15 by meansofQitsjhand wheel 17, the

16 on the base 14 so that rotation of the .base'14 willbemoved along the guides 13. On the base 14 is an upright tubular ably mounted a post 19. ,{On'thetop post 19 is a head 20 carrying a yoke 22-whi'chsup-[1- ports the carbon holder'sy'not shown, and.

. their adjusting screw 23. Any desirable form of carbon holders and adjustin vices may be utilized. 1 The parts'L-s own*..;

"theshaft 43 and sleeve 54 to turn together. 1

are similar to those described and shown in detail in my co end ng application, Se" No. 554,064, file April 17, 1922.-- ,l,

this specification, and in? is a side view of a fragment ofan arc lampsuch as used in plcture projecting upstanding lugs Hand 12. In the lugs 11- are mounted guide rods 13 upon'zwhich-a socket" 18 in which is rotatablyand slid= ,which friction wheel 41 is attached, 'isa com- 100 .pre'ss on spring 5.5. The compression spring tends to press the'friction gears 41-and 42 toward each-other and toward the/driving gear-E40.- Ajpin 56' may. passthrough shaft 'de-j 143 and notches in collar 54 so as to'cause 105 a The post 19 and head 20 are moved avers tically by means ofa' rod 24 having'a notch 25 engaging an extension 26-011 the head 20. The rod is slidably mounted inears 271m the socket 18 and a spiral gear 28 threaded on the rod 24 meshes with a spiral'gear 29 on shaft 30 which is operated-by suitable manual means. This mechanism provides means for raising and lowering the. carbon holders and their mounting. f The post 19 and head 20 are rotated in the socket 18 by a post 31' attached to the head 20, see Fig. 1. The post 31 engages-a pe- 'ripherally grooved wheel 32 fixed on a shaft r 33 and the latter is threaded in a member 34 on'the socket 18. The shaft 33 may beoperated by a hand wheel 35 so that rotation of said hand wheel causes longitudinal movement of shaft 33- and oscillatory movement of the head 20. a I At one end .of member 10is a platform 36 on which is mounted an electric motor 37,or 1ts equivalent. 'The motor 37 -is\ connected Jwith a shaft 38by means of a pair of spiral gears 39'. The shaft 38 carries a wedgeshaped friction wheel 4L0 whichextends be- .tween'two friction wheels 41 and 42' The fr1ct1on'wheel42 is fixed on a shaft 43 which is journaled 'in a bearing 4 1 on a frame 45-. The frame 45 has an ear 46 threaded on a shaft 47 and-the latter is journaled in an ear 48'on said member 45. The member 45 also has a portion i9 mounted in a guide 49' on frame10. The arrangement is such that upon 4 I rotation of'sc'rew47 by means of hand wheel 1. 50th'e "frame 15 ismovedtransver'sely with --i'. -Iesp'ectj T 'sliaft'x381so1 as to move shaft 43 {towardand away from" said -shaft.3 8." "j'ihe f relative' lnovements .of the shafts "-38 and43 If, 5

jvariesth'espeed aflwhi'chshaft 43 will be 1 driven due to sliding-the friction gears 41 and 42'onfricti'on wheel'40.a-

The shaft 43ihas apiral gear 51 fixed onit-a'nd' the latter meshes;v with a-spiral gear 52 on an uprlght shaft 53. Between the gear 51 J and an adjacent endgof a sleeve '54 to .-."I"he -shaft' 53"may have universal. joints 7 1n itsoith'at when 'the base 14 'is moved 1 toward" and away from the motor 37 or wh t g e sii d 2 ramme w h ,m

. respect to gear 40 the shaft-53 may continue to rotate without binding. At the top of shaft 53 is a spiral gear 58 which meshes with a spiral gear 59 and the latter is rotatably mounted on a shaft 60. Said gear 59 also has clutch teeth 61 which engage clutch teeth of a clutch collar 62; The clutch collar also has teeth 63 which engage the teeth r all) 64 of a gear 65 and the latter is secured to shaft 60. With this arrangement shaft 53 operates shaft 60 through gears 58 and 59, clutch collar 62 and gear 65, and the intermediate clutch teeth.

A gear 68 is mounted on a shaft 69. Said shaft 69 is provided with a hand wheel 70 so that when clutch collar 62 is out of engagement with gear 65 the hand wheel 70 I may operate through shaft 69 and gear 68 to rotate gear'65 and shaft 60. This gives uick or rapidspeed which-is especially useul in returning the carbon holders to their,

initial starting point for a new trim. For convenience in throwing the motor drive connection into and out of operative condition a lever 71 is pivoted as at 7 2. 'The lever 71 carries two pins 73 and 74 with the pin 73 engaging a peripheral groove in clutch collar 62 and pin 74 engaging a peripheral groove in the hub of gear 68. The shaft 69 is provided with a long peripheral groove 75 in the bearing of said shaft 69. A screw 76 is threaded 1n the bearing and engages the long recess 75 so as to give the shaft 69 a limited amount of longitudinal movement. A spring 77 is placed between gear 59 and collar 62 tending to hold gear 68 out of mesh with gear 65 and holding clutch teeth 63 in engagement with clutch teeth 64. This holds the motor drive mechanism in operative condition. When it is desired to operperipheral groove 78 may be formed in the hub of gear 59 with a hook member 79 engaging said peripheral groove for holding 'the gear 59 in proper relation with gear 58.

The screw 47 has gear teeth 80 formedon one end portion thereof and these gear teeth mesh witha gear 81 which has on one of its faces indications. A pointer 82 is fixed adga'cent the gear 81 to cooperate with the in ications on the latter. The indications on gear 81 and pointer 82 will indicate the speed at which the carbons are being 'fed.

The rotation of screw 47 will move gears 41 and 42 with respect to gear 40 and this relation is calibrated on the gear 81 so that the pointer 82 will always indicate the rate at which the carbons are being fed. When he wants the carbons to be fed faster or slower he adjusts the hand wheel 50 in accordance with theindications pointed to by pointer 82.

In operation, the motor37 may be any desirable means for. furnishing power to shaft 38. The gear49 on shaft 38 rotates the friction gears 41 and 42 at a rate corresponding to the relation between shafts 38 and 43. This adjustment is necessary in order to use carbons of different sizes, varying density,

and composition, aswell as variations of voltage and amperage in the current supply. As already described, the connection c011- nected with gears 41 and 42 operates the shaft to rotate screw 23 or other feeding means for the carbons. It has also been pointed out above that hand wheel may also be utilized for feeding the-carbons to give a hand feed to the latter. The motor actuated connection is also thrown out of and into gear as described above for feeding the carbons either by hand or power.

I claim 1. Are lamp feeding means comprising a carbon feeding screw; a shaft operatively connected with said screw; a motor driven connection having a portion rotatably mounted on said shaft;'a clutch collar rotatably mounted on said shaft and in engagement with the motor driven connection; a gear having clutch teeth' fixed on said shaft; means for moving said collar into and out of operative relation with said clutch teeth and hand-operated means for driving said gear.

2. Are lamp feeding means comprising a shaft; a motor driven gear rotatably mounted on said shaft with clutch teeth in said gear; a clutch collar journaled on said shaft and having clutch teethin both of its ends;

clutch teeth fixed on said shaft; and means for moving said collar to engage the clutch teeth on the latter with said clutch teeth fixed on said shaft, the clutch teeth between said collar and said motor driven gear always remaining in engagement.

3. Arc lamp feeding means comprisinga' shaft; hand operable means connectedwith said shaft; a member having clutch teeth fixed on said shaft; a clutch collar journaled on said shaft and having clutch teeth on both of its ends; a 'motor driven member journaled on said shaft and having teeth always in engagement with the clutch teeth at one end of said clutch collar; and a member connected with said collar "for moving the latter longitudinally of said shaft to engage and disengage the clutch teeth on one end of said collar and'the clutch teeth fixed onsaid shaft and hand-operated means for driv ng said first-named member,

- 4. Arc lamp shaft; a gear fixed on said shaft and having feeding means comprising a clutch teeth thereon; a hand operable gear meshing with the gear on said shaft; a clutch collar journaled on said shaft and having clutch teeth adapted to engage the clutch teeth of the gear fixed on said shaft; a motor driven member journaled on said shaft and'having teeth always in engagement with clutch teeth on said clutch collar; and a lever connected with said clutch collar and hand operable gear formoving the clutch teeth on said clutch collar into engagement with the gear on said shaft and moving the hand operable gear out of mesh with said gear on said shaft.

. gear inmeshing relation with the first-mentioned gear.

6. Arc lamp feedin means comprising a carbon adjusting mem er; a shaft operative-f ly connected withsaid carbon adjusting member; a clutch collar splined'on said shaft; a motor driven'connection operativel connected with said clutch collar; i clutc I teeth fixed on said shaft; ahand'operable of Aprihri; D.

shaft; said hand operable shaft being mounted for longitudinal movement; a connection between said hand operable shaft and said clutch collar; and teeth fixed on said fi-rst mentioned shaft whereby movement of the hand operable shaft in one direction disengages the clutch collar from said clutch teeth on .the first-mentioned shaft and efi'ectsan operative connection between said clutch teethand said hand operable shaft. V

' 7. Are lamp feeding means comprising a carbon adjusting member; a shaft operativel connected with said carbon adjusting mem er; a gear journaled on said shaft and held against longitudinal movement; a motor driven connection connected with said gear; a collar mounted on said shaft and having a clutch tooth connection with said-gear; a spring tending to move the clutch collar away from said gear; a gear fixed on said Shaft and having clutch teeth 60 thereon adapted to engage the clutch (:01- la:.''; a hand operable shaft mounted for longitudinal movement; a gear fixed on said hand operable shaft; and a lever having a connection with said gear and the hand o er able shaft and said clutch collar adapte to move the latter to engage and disengage the teeth on said gear with said clutch collar and move the gear on said hand operable shaft into and out of operative relation with the gear fixed on the first-mentioned shaft.

name to this'specification on this 13th day 1922. a i ALVAH-C. ROEBUCK.

In -,.testimony whereof I have signedmy 

